Buick 40 Special Tires

Buick 40 Special uses three tire sizes across this production span: 650-16 for 1939-1941 and 1946-1949, 760-15 for 1950-1958, and 710-15 for 1954-1958. The 650-16 size fits 16-inch rims, while both 760-15 and 710-15 fit 15-inch rims. Within the later years, 710-15 and 760-15 are both listed, so the size cannot be chosen by year alone once you reach 1954.

The practical way to sort a Buick 40 Special is to verify the wheel diameter first, then confirm whether the car calls for the narrower 710-15 or the wider 760-15 among the 15-inch applications. A wheel measurement, an original owner’s manual, a period service reference, or a marque specialist can help settle that choice before the tires are fitted.

On a Buick 40 Special, 650-16 is a numeric bias-ply size. The 650 portion represents a nominal 6.50-inch section width, written without a decimal point, and the 16 identifies the rim diameter in inches. In this fitment range, 650-16 is the earlier Buick 40 Special size used from 1939 to 1941 and again from 1946 to 1949.

That matters because a Buick 40 Special carrying 650-16 should be on a 16-inch wheel, not a 15-inch wheel. Many collector-car owners focus on the first number and assume it is the key measurement, but the rim diameter is what determines whether the tire can mount at all. Confirm the wheel itself before moving on to sidewall style or brand selection.

Buick 40 Special uses two rim diameters across these years: 16-inch rims with 650-16 through 1949, and 15-inch rims with 760-15 beginning in 1950 and with both 760-15 and 710-15 from 1954 through 1958. The wheel change is the major dividing line in Buick 40 Special tire fitment. Once the car is in the 15-inch era, there are still two possible sizes to sort out in the later years.

That makes wheel diameter the first thing to verify on any Buick 40 Special that is new to you or partway through restoration. Cars may have had wheels swapped over decades of use, and later-year cars need a second check to determine which 15-inch size belongs on the car. Start with the wheel, then move to the tire size.

The Buick 40 Special sizes listed here are all numeric bias-ply sizes, and the available passenger-car products in 650-16, 760-15, and 710-15 are bias-ply construction. For that type of fitment, a tube is required. That applies to the period-style passenger tires used on Buick 40 Special across the full year range covered here.

Tube fitment is not just a restoration detail; it is part of how these tires are intended to be used on collector vehicles. The tube, flap requirements where applicable, and wheel condition should all be considered together during mounting. Have the wheel inspected for rust, burrs, and bead-seat condition so the completed assembly is appropriate for regular collector-car driving.

A 1955 Buick 40 Special falls into the later group where two sizes are listed: 710-15 and 760-15. Both are 15-inch tires, so wheel diameter alone does not settle the question. The next step is to confirm the specific wheel width, compare the tire already on the car if it is known to be correct, and check period Buick references tied to the exact configuration.

That approach matters because choosing between 710-15 and 760-15 affects overall section width and the visual stance of the car. If the Buick 40 Special is being restored, use factory literature, marque-club guidance, or a trusted restoration specialist to match the car’s intended fitment. If the car is a long-time driver, inspect for prior wheel or tire substitutions before replacing anything.

Buick 40 Special tires in these sizes are offered in blackwall, narrow whitewall, and wide whitewall styles. The 650-16 selections include blackwall and wide whitewall options, while the later 15-inch sizes include blackwall, narrow whitewall, and wide whitewall choices depending on the exact size and brand. That gives a restorer room to match either a more restrained factory look or a more prominent period whitewall presentation.

Sidewall choice changes the character of a Buick 40 Special almost as much as the size itself. Earlier cars often look most natural on blackwalls or moderate whitewalls, while many 1950s cars benefit from the wider whitewall styles that suit the era’s styling. Pick the sidewall after the size is settled so appearance does not override fitment.

Buick 40 Special tires in these sizes are available from BFGoodrich, Coker Classic, Firestone, Garfield, Excelsior, Lester, Goodyear, Universal Vintage Tire, STA, Tornel, and US Royal. Brand coverage varies by size, with the broadest range appearing in 650-16 and strong bias-ply passenger-car choices continuing in the 15-inch sizes. Some brands emphasize classic passenger styling, while others in 650-16 also extend into military and truck-type tread patterns.

Brand choice is usually the final step after size, wheel diameter, and sidewall style are settled on a Buick 40 Special. A car restored for formal judging may benefit from a period-appropriate visual style, while a casual driver may prioritize a particular tread appearance or whitewall width. Compare the details within the correct size instead of starting with the brand name.

Buick 40 Special fitments appear across several series, including Silvertown Classic Bias Ply, Coker Classic Bias Ply, Firestone Classic Bias Ply, Garfield Classic Bias Ply, Excelsior Bias Ply, Lester Classic Bias Ply, Deluxe All-Weather, Super Cushion Deluxe, Super Cushion, Universal Classic Bias Ply, US Royal Classic Bias Ply, and several STA and truck-oriented series in 650-16. The main distinction is between period-style passenger-car bias-ply lines and the heavier-duty military or truck-family options that share the same nominal size.

For most Buick 40 Special passenger cars, the passenger-car bias-ply series are the natural place to start because they better match the car’s intended appearance and use. The truck and military-style offerings in 650-16 are worth noting if the application is unusual, but they should not be treated as automatic substitutes for normal passenger-car fitment. Match the series to how the car is built and how it will be used.

A Buick 40 Special should be stored clean, dry, and out of direct sunlight, with the tires protected from ozone sources such as electric motors, battery chargers, welders, or running compressors. Keep the tires properly inflated for storage and park on a smooth, clean surface rather than bare concrete or damp ground. If the car will sit for extended periods, moving it occasionally can help reduce flat-spotting on bias-ply tires.

Good storage practice matters because Buick 40 Special tires are often used on cars that see limited annual mileage but long static periods. Bias-ply tires can develop flat spots or sidewall stress more from inactivity than from road use. If the car is stored for a season at a time, periodic inspection and gentle repositioning are simple steps that help preserve both appearance and service life.

Tires on a Buick 40 Special should be inspected before each drive and more carefully at regular intervals even if the car covers very few miles. Check inflation, tread and sidewall condition, valve stems, tube-related air retention, and any signs of cracking, impact damage, or uneven wear. Collector cars often age their tires through time and storage conditions rather than through mileage alone.

A more thorough inspection should also happen any time a Buick 40 Special comes out of long-term storage, returns from transport, or shows a change in steering feel or ride quality. Catching a problem early can prevent wheel damage and preserve hard-to-find restoration components. Regular inspections are especially important with bias-ply tires because their feel and wear patterns differ from modern daily-driver radials.

Tires on a Buick 40 Special should be replaced when age, cracking, hardening, bulges, impact damage, repeated air loss, or structural deterioration appears, even if the tread still looks deep. Collector-car tires often age out before they wear out. A tire that looks attractive on a low-mileage Buick 40 Special can still be unsuitable for road use if the casing and rubber have deteriorated with time.

That is why replacement decisions on a Buick 40 Special should consider condition and age together, not tread depth alone. If an older tire is already on the car and its service history is unclear, a specialist inspection is wise before continued use. Fresh-looking whitewalls and long periods of garage storage do not automatically mean the tire remains roadworthy.

Buick 40 Special uses 650-16 in the 1939-1941 and 1946-1949 years, then moves to 760-15 from 1950 onward, with both 760-15 and 710-15 appearing from 1954 through 1958. The available replacement lines are all period-style bias-ply series, but multiple brands and series exist within those sizes. That means the correct original-style choice for a specific Buick 40 Special depends on the exact year and, in the later years, the exact configuration.

For restoration work, start with the size that matches the year range and wheel diameter, then narrow the visual details such as blackwall, narrow whitewall, or wide whitewall. If the goal is strict factory authenticity, Buick literature and marque-club guidance are the best references for the exact presentation used on a particular car. That is especially important from 1954 through 1958, when two sizes are listed.

Correct tire fitment can materially affect how a Buick 40 Special is judged and how convincing the restoration appears. Size, wheel diameter, sidewall style, and overall tire profile all influence stance and period correctness. A Buick 40 Special on the wrong wheel diameter or the wrong 15-inch size can look visually off even to a casual enthusiast, and trained judges will usually notice those details quickly.

For value and show presentation, the best result comes from matching the tire to the car’s production year and intended appearance rather than choosing only by convenience. Marque clubs, factory photos, and period sales material can help settle close decisions about whitewall width and late-year size selection. Tires are one of the first visual cues on a finished restoration, so they deserve careful attention.

Buick 40 Special restoration choices in these sizes include blackwall, narrow whitewall, and wide whitewall, depending on the exact size and brand. Blackwalls suit a more restrained or earlier-period appearance, while the later 15-inch applications offer several whitewall presentations that align well with 1950s styling. There is no single visual answer for every Buick 40 Special across 1939 to 1958 because the model spans very different styling eras.

The right sidewall for a Buick 40 Special restoration should follow the year and the character of the individual car, not just personal taste. If you are restoring a formal postwar sedan, a wide whitewall may be visually appropriate; if you are preserving a plainer early car, blackwall may look more natural. Settle the size first, then choose the sidewall style that best matches the car’s intended period image.

A properly fitted, properly mounted, and properly maintained tire can be appropriate for public-road use on a Buick 40 Special, provided the rest of the car is in equally sound mechanical condition. These fitments are bias-ply tires, so they deliver a driving feel and response pattern different from modern radial-equipped cars. Safety depends on the total condition of the Buick 40 Special, not only on the tire itself.

Before regular road use, the Buick 40 Special should have its steering, brakes, suspension, wheels, and alignment checked to the same standard as the tires. Drivers also need to account for the behavior of bias-ply tires by allowing more margin in following distance and by avoiding abrupt maneuvers. A collector car on correct tires can be enjoyable on the road, but it should always be driven within its period capabilities.

Before driving a Buick 40 Special, check tire pressure, visible sidewall condition, tread condition, and whether the tire size matches the wheel diameter on the car. Also inspect for age cracking, cuts, loose valve hardware, and any sign that the car has been sitting on underinflated tires. Because Buick 40 Special spans both 16-inch and 15-inch wheel applications, confirming the wheel-and-tire match is especially important on newly acquired cars.

The tire check should be part of a broader walk-around that includes wheel fasteners, brake feel, steering free play, and fluid leaks. Collector cars often spend long periods parked, and the first drive after storage is when old issues show up. Taking a few extra minutes before departure is one of the simplest ways to protect both the Buick 40 Special and its tires.

A Buick 40 Special on period-style bias-ply tires should be driven at moderate speeds appropriate to the car’s age, condition, road surface, and mechanical state. These tires are intended to preserve the original type of driving character rather than to mimic the high-speed confidence of a modern radial on a modern chassis. The realistic limit is often set by the total condition of the car long before the driver reaches modern highway expectations.

The best practice is to build speed gradually, evaluate steering and brake response, and keep the Buick 40 Special within a pace that feels settled and predictable. Long high-speed runs should be approached conservatively, especially on cars that are newly restored or recently returned to service. Smooth inputs and sensible cruising speeds are part of using period-style tires responsibly on a collector Buick.